Steel doorlock



Jan. 2, 1934. 5 COOPER 1,942,087

STEEL DOORLOCK Filed April 1933 43 Sheets-Sheet l Invemor ,Smue/ 00 0911Q By flltomey Jan. 2, OPER STEEL DOORLOCK Filed April 7, 1953 3Sheets-Sheet 2 -2 .63 lnuer llor Jan. 2, 1934.

s. COOPER 1,942,087

STEEL DOORLOCK Filed April 7, 1933 3 Sheets-Sheet 5 fame; a

fl Home y Inventor F X Patented Jan. 2, 1934 UNITED STATES ATENT 4Claims.

This invention relates to a door lock, the general object of theinvention being to so form the parts of the lock that they can be formedof steel and also to provide a lock bolt formed of a plurality ofsections, each having notches therein, some of which are adapted toreceive the wards of a key and others of which are adapted to receive apart of a member, rocked by the key, said part of the member holding thebolt in projected or retracted position.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which:

Figure l is a view looking into the lock casing, with the cover removedand with parts in section, said figure showing the bolts in projectedposition.

Figure 2 is a similar view, but showing the lock bolt in retractedposition.

Figure 3 is a similar view but showing the parts engaged by a key andwith the parts about to be moved to retracted position.

Figure 4 is a section on line 4-4 of Figure 3.

Figure 5 is a view of the carriage.

Figure 6 is a view of the latch bolt.

Figure '7 is a view of the night latch for holding the latch bolt inprojected position.

Figure 8 is a view of the key used with the lock.

Figure 9 is a view of the member which is pivoted to the carriage pivotbolt and to the inner end of the latch bolt.

Figure 10 is a view of the knob operated member for actuating the latchbolt.

Figure 11 is an end view of said member.

Figure 12 is a view of the keeper member.

Figure 13 is an end view of said keeper member.

In these drawings, the numeral 1 indicates the lock casing which ispressed from a single sheet of steel and is formed with the openings 2in one end thereof, one for the lock bolt 3 and the other for the latchbolt 4. Each opening is 50 formed by cutting the metal and bending themetal inwardly, as shown at 5, to form guiding means for the bolts. Asuitable cover plate 6 is provided for the casing and this is held inplace by the bolts or screws 7. A carriage 8 is pivoted 5 in the casingby the screw '7' and said carriage is also formed of a single piece ofsteel bent and cut, as shown in Figure 5, to provide the tongue 9, thedog 10 which is reinforced by the curved tongue 11, the projection 12and the hook carrying part 13. This part 13 has one end of a spring 14attached thereto, the other end being attached to an inwardly bent part1 5 of one of the side walls of the casing. The projection 12 passesthrough an elongated longiv tudinally extending slot 16 in the bolt 3and 65 the dog 10 is adapted to engage the notch 17 in the bolt 3 tohold the bolt projected or the notch 18 to hold the bolt retracted.Smaller notches 19 are placed between the notches l7 and 13 which act assafety notches. As will be I seen from Figures 1 and 2, the spring 14tends to hold the carriage 8 in a position with the dog 10 engaging oneof the notches in the bolt, but permits the carriage to be swungupwardly when the key 20 is placed in the keyhole 21 and 7 turned to theposition shown in Figure 3, so that the carriage is moved to a positionwhere the dog will move out of a notch, as also shown in Figure 3. Apart of the key will engage the tongue 9 when the key is turned so as toraise the carriage and then upon further movement of the key, its wards22 will engage the V-shaped notches 23 in the bolt to shift the lockbolt 3 from projected position to retracted position. The projection 12limits sliding movement of the bolt and, as shown in Figure 4, the bolt3 is formed of a plurality of plates 25, alternate plates being providedwith deeper notches 23 than the other plates, as shown in full anddotted lines in Figure 3, so that portions of the key will engage someof the plates, while other portions of the key will engage the otherplates. This renders it impossible to unlock the bolt unless the key forwhich the lock is designed is used. By substituting other plates for theoriginal plates forming the bolt, the lock can be changed for use withanother key. The top plate, as viewed in Figure 4, is made longer thanthe other plates, with its extension bent back upon itself, as shown at25, so as to engage the top of the casing, this extension being the samethickness as that part of the carriage on which the bolt slides, asshown in Figure 4.

A member 26 is pivoted to the screw '7' and has an upstanding lug 27 atits free end which passes through a hole in the inner end of the latchbolt 4 and a triangular shaped member 28 of U- shape in cross sectionhas openings 29 therein for receiving the knob stem 30 and by turningthe knob, the member 28 is rocked to retract the latch bolt, the latchbolt being normally held projected by means of the spring 31 having oneend attached to the inner end of the casing and its other end connectedto the bight of the substantially U-shaped part 26 of the member 26.

This latch bolt is also formed of a single piece of steel, the frontpart of which is of channel shape with the bight part of the channel cutand bent, as shown at 4' in Figure 6, which forms a rounded outer endfor the bolt. This formation of the latch bolt not only enables it to beformed of one piece of metal, but also makes it of considerablestrength.

A slit 4 is formed in one side of the bolt 4 and said side, to one sideof the slit, is bent inwardly, as shown in Figure 6, so as to provide akeeper for the night latch 31 formed of a strip of metal having itsinner end held in a space formed by the bent-over part 32 of the casing.as shown in Figure 2, with its front end cut and bent to form a dog 33for engaging the keeper member formed by the slit 4" and a finger piece34 which passes through a slot 35 formed in the top of the casing. Thusby moving the member 31 rearwardly and downwardly, to place the shoulderof the part 34 under the bent-up part 36 at the top of the casing, thedog 33 will engage in the slit 4 and thus hold the latch bolt 4 inprojected position, as shown in Figure 2. When the latch bolt is to beused in an ordinary manner, the member 31' is moved forwardly andupwardly to place the shoulder of part 34 over a part of the top of thecasing, as shown in Figure 1, so that it will not engage the latch boltand the same can be moved in the ordinary manner by turning the knob.

The keeper member 37 for the two bolts is also formed of a single pieceof metal bent and shaped as shown in Figure 12, with an edge of the toppart of the keeper member curving upwardly and outwardly, as shown at38, to form a striker plate for the latch bolt, so that as the door isbeing closed, the latch bolt will strike the plate 38 and be movedinwardly against the action of the spring 31 and then as the latch boltpasses the plate 33, the spring 31 will move it to projected position.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction andin the combination and arrangement of the several parts, provided thatsuch changes fall within the scope of the appended claims.

What is claimed is:

1. In a lock of the class described, a bolt formed of a plurality ofsuperimposed sections, a pivoted member upon a part of which the innerend of the bolt slides, said bolt having an elongated slot in its innerpart, a projection on the pivoted member extending through the slot, adog on the pivoted member and the bolt having notches therein engaged bythe dog when the pivoted member is in lowered position, said pivotedmember being adapted to be rocked on its pivot by a key for raising thedog out of a notch in the bolt and said sections of the bolt having keyengaging notches therein of different sizes whereby the key will retractthe bolt and spring means for normally holding the pivoted member inlowered position.

2. A lock of the class described comprising a casing formed of a singlepiece of steel, a bolt slidably arranged in the casing and formed of aplurality of plate-like sections of steel, a member pivoted in thecasing formed of a single piece of steel and provided with a dog, atongue on which a part of the bolt slides and a projection, said bolthaving an elongated slot therein through 95 which the projection passes,said pivoted member having a hook-shaped part thereon, a springconnecting the hook-shaped part with a part of the casing for normallyholding the pivoted mem ber in lowered position, said bolt having frontand rear deep notches for engagement by the dog for holding the bolt inretracted or projected position and shallow safety notches arrangedbetween the deep notches, the plates forming the bolt having notchestherein for receiving portions of a key and said tongue being adapted tobe engaged by a part of a key for moving the member on its pivot formoving the dog out of engagement with a notch in the bolt, the notchesof alternate plates being deeper than those of the other plates.

3. A lock of the class described comprising a casing, a member pivotedtherein, a dog on the member, a tongue on the member, a projection onthe member, a bolt having a slot therein through which the projectionpasses and said bolt having notches therein for receiving the dog forholding the bolt'in projected or retracted position, said bolt alsohaving key engaging notches therein whereby a key will project orretract the bolt and move the pivoted member to free the dog from anotch,

, e. A lock of the class described comprising a casing formed of asingle piece of material, a bolt slidably arranged in the casing, amember 125 pivoted in the casing and having a dog thereon and thebolt'having notches therein, a spring for normally holding the pivotedmember with the dog engaging a notch for holding the bolt in retractedor projected position, said pivoted mcm- 130 ber being adapted to bemoved by a key to a position to release the dog from a notch and keyengaging means on the bolt for retracting and projecting the bolt by akey.

SAMUEL COOPER.

